Revenue Recognition (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue Recognition (Details) [Line Items]
Aggregate unrealized loss on portfolio			$ 1,300,000
Gross revenue from stock borrow/ Stock loan	$ 4,008,000	$ 4,183,000	11,963,000	$ 11,909,000
Maximum [Member]
Revenue Recognition (Details) [Line Items]
Expenses from stock borrow/stock loan	13,000,000	9,921,000	34,300,000	26,222,000
Minimum [Member]
Revenue Recognition (Details) [Line Items]
Expenses from stock borrow/stock loan	$ 8,992,000	$ 5,738,000	$ 22,337,000	$ 14,313,000